Sectional heat resisting metallic surface



Oct. 24, 1933 J. O'F. CLARK 1,932,243

SECTIONAL HEAT RESISTING METALLIC SURFACE Filed April 28. 1932 PatentedOct. 24, 1933 Mar sEc'rioNAL HEAT RESISTING METALLIC SURFACE I JohnOFallon Clark, University City, Mo., as-

signor to American Manganese Steel Company, Chicago Heights, llL, acorporation of Maine Application April 28, 1932. Serial No. 607,931

3 Claims.

This invention relates to improvements in sectional heat resistingmetallic surfaces such as,

causing unequal expansion throughout the area' of the surface;

The nature of the present improvements will "be more readily understoodby reference to pa ents of Frank A. Fahrenwald, 1,629,689, 1,643,765,and 1,798,460, which issued, respectively, May 24, 1927, September 27,1927, and March 31, 1931. The Fahrenwald patents disclose sectional heatresisting metallic surfacesof the same general type'and the manner ofusing such structures.

The heat resisting surfaces are formed from special heat resistingalloys of suflicient thickness and surface area small enough to preventwarping of the plates. 1

The present improvements are particularly directed to heat resistingsurfaces which form substantially vertical barriers and in which theindividual metal plates are gravitally supported in sealing relationwith respect to each other, as in the Fahrenwald Patents 1,529,689 and1,643,766, although the features of novelty may haveutility for use in asubstantially horizontal heat resisting surface, such as in theFahrenwald Patent 1,798,460.

It is an object of" the present invention to connect a pair of sectionalplates, which together build up the heat resisting surface, by formingthe lower edge of an upper plate with a pro jecting ledge and formingthe upper edge of a lower plate with a continuous overlap adapted torest upon the projecting ledge of the upper plate for gravital supportof the lower plate.

It is further a feature of the present invention that in associating theplates as above described the plates are sealed againstpassageof gas bya sealing edge at which the plates contact for gravital support withrespect to each other and an additional sealing edge due to thegravitally supported plate hanging in such a manner that its uppermarginal edge contacts with the lower marginal edge of the supportingplate.

It is further an object of the present invention to provide cooperatinglugs upon the respective plates for preventing relative separation,which are so positioned that the plates may be readily assembled ordisassembled by a relatively short sliding movement which will move thelugs out of interlocking engagement with respect to each other.

Further objects and advantages of the present improvements will be morereadily apparent from the following description taken in connection withthe attached drawing, in whic'h Figure 1 is a rear elevation of thesectional plate assembly; r

Figure 2 is a detail section taken on the plane indicated 2--2 in Figurel, and

Figure 3 isa detail section taken on the plane indicated 3'3 in Figure1.

Figure l is a rear view of a portion of a damper composed of a pluralityof sectional plates 10., The front faces 11 of the plates are smoothplane surfaces which together constitute a smooth substantiallycontinuous surface which, in the case of a damper assembly, may bepresented to the region of the highest temperature, The respectiveplates 10 are gravitally supported or suspended in series' Thus inFigure l the middle plate is suspended from the upper plate and thelower plate is suspended from the middle plate,

This gravital suspension of the plurality of plates is obtained in thefollowing described manner. 7

Each of the plates is formed with a continuous ledge 12 projecting fromthe rear face 13 of the plate. The upper face 14 of the ledge 12 isslightly inclined downwardly towards the front face 11 of the plate. Thelower marginal edge of the plate 10 is formed to present an inclinedsurface 15 substantially parallel to the inclined surface 14 of theledge 12. It will be noted that the surfaces 14 and 15 are offset, bothvertically and horizontally, with respect toeach other.

Each of the plates 10 is formed at its upper edge with a hook-shapedportion or overhang 16 which may, as shown, be continuous throughout theentire length of the plate. The overhang 16 is adapted to overlap theprojection 12 upon the lower edge of the plate thereabove and it will benoted that the lower face of the extremity 17 of the overhang 16 isadapted to, rest upon and contact in sealing engagement with the topface 14 of the projection 12. Since the center of gravity of the plate10, which is gravitally supported by its hook-shaped portion 16, isoffset with respect to the contact at the face 14 of the projection 12,

there will be a tendency for the supported plate plate. The overhang 16is separated from contact with the projection 12 between the sealingcontacts 14 and 15 as at 19 to permit expansion.

In order to hold the plates against accidental separation a plurality ofspaced lugs 20 are provided on the continuous overhang 16, which areadapted to interlock with a plurality of depending lugs 21 on the rearface of the supporting plate. It will be noted that the lugs 20 and 21will interlock to prevent separation of the plates in a direction at anangle to the plates. Since the lugs 20 and 21 are arrangedat spacedpoints with respect to the length of the plates, it will be noted thatit is only necessary to slide one of the plates with respect to itsconnected plate in order to bring the lugs 20 and 21 out of line andpermit separation of the plates. The assembly of the plates is thereverse of the separation thereof, as will be readily understood.

The advantage of this arrangement is that it is unnecessary to slide oneplate the entire length of a connected plate as is required in somepreviousconstructions. If the plates are very large it is difiicult toassemble the plates when it is necessary that each plate must be slidthe entire length of a connected plate.

I have also disclosed means for holding the plates against relativelongitudinal sliding movement. A socket 22 is formed in the hook-shapedportion 16 and a vertical key 24 is adapted to fit in the socket. 22.The key 24 is positioned be tween a pair of lugs 26 on the supportingplate and may be welded theretoas shown at 28.

I claim:

l. A sectional heat resisting metallic barrier composed of a pluralityof plate sections assembled in a substantially common plane, each ofsaid plates being formed with an over-hang portion at its upper edge forsuspension of the plate and a ledge at its lower edge for gravitallysupporting the plate therebelow through cooperation with the over-hangportion thereof, a plurality of spaced lugs on each of the plates, saidplates being assembled by relative sliding movement to bring said lugsinto cooperating relationship to prevent separation of the plates in adirection at an angle to the plane of the plates and means for holdingthe plates against-relative sliding movement to prevent longitudinalseparation thereof. V

2. A. heat resisting metallic barrier composed of a plurality of platesections suspended in series arrangement, said plates presenting asubstantially smooth continuous surface on one side, a continuoussupporting ledge adjacent the bottom edge of each of said plates, acontinuous overhang portion along theupper edge of each of said platesadapted to fit over and rest upon the supporting ledge of a platethereabove, said plates being brought into sealing contact at theirmeeting marginal edges due to the suspended weight of the plates andcooperating lugs on adjacent plates for preventing separation of theplates in a direction at an angle to the plane of the plates.

3. A sectional heat resisting metallic barrier composed of a series ofsuspended plate sections,

a continuous supporting ledge extending along loo above for gravitalsuspension thereon, the adja cent marginal edges of the plates formingcontact faces parallel with the contact face on the sup porting ledge,said plates being brought into sealing contact at the marginal edgesthrough the JOHN OFALLON CLARK.

